21 Various decisions of this Court are also useful points of reference in regard to an originating summons of the kind before me. In Porter v McDonald & Anor [1984] WAR 271, a contract between the parties for the purchase and sale of shares contained a provision whereby the appellants, as purchaser, charged any interest which they, or any of them, had from time to time in any real property in the State with the payment of the price for the shares. When the parties to the contract became involved in litigation, the respondents, pursuant to the equitable charge in the contract, lodged a caveat against land owned by the appellants and which they were on the point of selling. The appellants owned other land exceeding the amount outstanding under the contract. They sought to have the caveat removed, contending that, because it was lodged for an ulterior purpose (to bring pressure on the appellants) and because the damages claimed by them in the other action would extinguish the debt, and because there was sufficient other land the subject of the equitable charge which could be caveated, the court should, in the exercise of its discretion, order the removal of the caveat. The Full Court held that, when it was not in dispute that the caveator had a valid contractual right to the interest sought to be protected by the caveat, matters such as the sufficiency of other security, the motives of the caveator and the balance of convenience are irrelevant and would not furnish grounds to order the removal of the caveat.